General improvements

[LBF38]

• add mdsvex for content w/ svelte components (markdown + svelte) #23
• add metadata and SEO improvements
• update footer w/ other contact links and social media (GitHub, LinkedIn, ...) #22
  • add links to other projects and apps
• add breadcrumb w/ logo like GH blog, ... #20
• add changesets for better release processes #21
• add custom domain config #25
• add web analytics before publishing and distributing the website #29
• update project README documentation #31

[LBF38]

For SEO considerations, see https://github.com/artiebits/svelte-seo

[LBF38]

For mdsvex, specify the default layout in the mdsvex.config.js (cf. docs)